/*
 * OpenZone - simple cross-platform FPS/RTS game engine.
 *
 * Copyright © 2002-2014 Davorin Učakar
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @file nirvana/TechGraph.hh
 */

#pragma once

#include <nirvana/common.hh>

namespace oz
{

class TechGraph
{
public:

  struct Node
  {
    static const int MAX_DEPS = 8;

    enum Type
    {
      TECHNOLOGY,
      BUILDING,
      UNIT,
      ITEM,
      OBJECT
    };

    Type                   type;
    int                    price;
    float                  time;
    String                 name;
    String                 title;
    String                 description;
    union
    {
      const BSP*           building;
      const ObjectClass*   object;
    };
    SList<Node*, MAX_DEPS> requires;
    float                  progress;
  };

private:

  List<Node> nodes;

public:

  List<const BSP*>         allowedBuildings;
  List<const ObjectClass*> allowedUnits;
  List<const ObjectClass*> allowedItems;
  List<const ObjectClass*> allowedObjects;

private:

  Node* findNode(const char* name);

public:

  bool enable(const char* technology);
  bool disable(const char* technology);

  void enableAll();
  void disableAll();

  void update();

  void read(Stream* is);
  void write(Stream* os) const;

  void load();
  void unload();

};

extern TechGraph techGraph;

}
